package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import io.swagger.util.Json;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    UserMapper userMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer webSocketServer;


    @Override
    @Transactional
    public OrderSubmitVO submit(OrdersSubmitDTO ordersSubmitDTO) {
        //异常处理 （购物车为空 地址簿为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook==null)
        {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        ShoppingCart shoppingCart=new ShoppingCart();
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if(shoppingCartList==null){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //2. 向订单表插入1条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setAddress(addressBook.getDetail());
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(BaseContext.getCurrentId());

        orderMapper.insert(orders);

        List<OrderDetail> orderDetailList = new ArrayList<>();
        //3. 向订单明细表插入n条数据
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();//订单明细
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());//设置当前订单明细关联的订单id
            orderDetailList.add(orderDetail);
        }

        orderDetailMapper.insertBatch(orderDetailList);

        //4. 清空当前用户的购物车数据
        shoppingCartMapper.cleanByUserId(BaseContext.getCurrentId());

        //5. 封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();

        return orderSubmitVO;


    }
    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);
/*
        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }*/

        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code", "ORDERPAID");

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        /*// 修改订单状态 支付状态 支付时间
        Orders orders = orderMapper.getByNumber(ordersPaymentDTO.getOrderNumber());
        orders.setPayStatus(Orders.PAID);//已支付
        orders.setStatus(Orders.TO_BE_CONFIRMED);//待接单
        orders.setCheckoutTime(LocalDateTime.now());
        orderMapper.update(orders);*/
        paySuccess(ordersPaymentDTO.getOrderNumber());
        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);
        //向前端发送提醒
        Map map=new HashMap<>();
        map.put("type",1);
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号:"+outTradeNo);
        String json=JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);

    }
    private List<OrderVO> getOrderVoList(Page<Orders> page) {
        List<Orders> ordersList=page.getResult();
        List<OrderVO> list=new ArrayList<>();
        if(!CollectionUtils.isEmpty(ordersList))
        {
            for (Orders orders : ordersList) {
                OrderVO orderVo=new OrderVO();
                BeanUtils.copyProperties(orders,orderVo);
                //设置菜品简介
                String str=getOrderDishesStr(orders);
                orderVo.setOrderDishes(str);
                //设置菜品明细集合
                List orderDetailList=orderDetailMapper.getByOrderId(orders.getId());
                orderVo.setOrderDetailList(orderDetailList);
                list.add(orderVo);
            }
        }
        return list;
    }
    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

    /**
     * 订单分页查询
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult page(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
        Page<Orders> page=orderMapper.pageQuery(ordersPageQueryDTO);
        Long total=page.getTotal();
        List<OrderVO> list=getOrderVoList(page);
        return new PageResult(total,list);
    }

    /**
     * 查询历史订单
     * @param ordersPageQueryDTO
     * @return
     */


    /**
     * 查询每种状态订单个数
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        Integer confirmed=orderMapper.statistics(Orders.CONFIRMED);
        Integer toBeConfirmed=orderMapper.statistics(Orders.TO_BE_CONFIRMED);
        Integer deliveryInProgress=orderMapper.statistics(Orders.DELIVERY_IN_PROGRESS);
        OrderStatisticsVO orderStatisticsVO=new OrderStatisticsVO();
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);

        return orderStatisticsVO;
    }

    /**
     * 订单取消
     * @param ordersCancelDTO
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        Orders orders=new Orders();
        BeanUtils.copyProperties(ordersCancelDTO,orders);
        orders.setCancelTime(LocalDateTime.now());
        orders.setStatus(Orders.CANCELLED);
        orderMapper.update(orders);

    }


    /**
     * 订单完成
     * @param id
     */

    @Override
    public void complete(Long id) {
        Orders orders=new Orders();
        orders.setId(id);
        orders.setStatus(Orders.COMPLETED);
        orderMapper.update(orders);
    }

    /**
     * 拒绝订单
     * @param ordersRejectionDTO
     */
    @Override
    public void rejetion(OrdersRejectionDTO ordersRejectionDTO) {
        Orders orders=new Orders();
        BeanUtils.copyProperties(ordersRejectionDTO,orders);
        orders.setStatus(Orders.CANCELLED);
        orderMapper.update(orders);

    }

    /**
     * 接单
     *
     * @param ordersConfirmDTO
     */

    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders=new Orders();
        BeanUtils.copyProperties(ordersConfirmDTO,orders);
        orders.setStatus(Orders.CONFIRMED);
        orderMapper.update(orders);
    }

    /**
     * 订单详细信息查询
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Integer id) {
        //查询订单基本信息
        Orders orders=orderMapper.getById(id);
        OrderVO orderVO=new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        String str=getOrderDishesStr(orders);
        orderVO.setOrderDishes(str);
        //查询订单详细信息
        List<OrderDetail> list=orderDetailMapper.getByOrderId(Long.valueOf(id));
        orderVO.setOrderDetailList(list);
        return orderVO;
    }

    /**
     * 订单派送
     * @param id
     */

    @Override
    public void delivery(Integer id) {
        Orders orders=orderMapper.getById(id);
        //订单为空或者状态不为已结单 抛出异常
        if(orders==null||!orders.getStatus().equals(3))
        {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //修改订单状态
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);

    }

    /**
     * 再来一单
     *
     * @param id
     */
    public void repetition(Long id) {
        // 查询当前用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        // 将购物车对象批量添加到数据库
        for (ShoppingCart shoppingCart : shoppingCartList) {
            shoppingCartMapper.insert(shoppingCart);
        }

    }
    /**
     * 用户取消订单
     *
     * @param id
     */
    public void userCancel(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(Math.toIntExact(id));

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }
    /**
     * 客户催单
     * @param id
     */
    public void reminder(Long id) {
        //TODO
        Orders orders=orderMapper.getById(Math.toIntExact(id));
        //向前端发送提醒
        Map map=new HashMap<>();
        map.put("type",2);
        map.put("orderId",orders.getId());
        map.put("content","订单号:"+orders.getNumber());
        String json=JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
    }


}
